Send MARKREAD push notifications

Allows clients to dismiss notifications when another client marks
the conversation as read.

downstream.go

@@ -2004,6 +2004,8 @@ func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.
 				if err := uc.network.deleteChannel(ctx, upstreamName); err != nil {
 					dc.logger.Printf("failed to delete channel %q: %v", upstreamName, err)
 				}
+
+				uc.network.pushTargets.Del(upstreamName)
 			}
 		}
 	case "KICK":
@@ -2994,6 +2996,16 @@ func (dc *downstreamConn) handleMessageRegistered(ctx context.Context, msg *irc.
 				})
 			}
 		})
+
+		if broadcast && network.pushTargets.Has(entity) {
+			// TODO: only broadcast if draft/read-marker has been negotiated
+			// TODO: use lower priority
+			network.pushTargets.Del(entity)
+			network.broadcastWebPush(ctx, &irc.Message{
+				Command: "MARKREAD",
+				Params:  []string{entity, timestampStr},
+			})
+		}
 	case "SEARCH":
 		store, ok := dc.user.msgStore.(msgstore.SearchStore)
 		if !ok {

irc.go

@@ -464,6 +464,12 @@ func (cm *monitorCasemapMap) ForEach(f func(name string, online bool)) {
 	}
 }
 
+type casemapSet struct{ casemapMap }
+
+func (cs *casemapSet) Add(name string) {
+	cs.set(name, nil)
+}
+
 func isWordBoundary(r rune) bool {
 	switch r {
 	case '-', '_', '|': // inspired from weechat.look.highlight_regex

upstream.go

@@ -522,21 +522,21 @@ func (uc *upstreamConn) handleMessage(ctx context.Context, msg *irc.Message) err
 		self := uc.isOurNick(msg.Prefix.Name)
 
 		ch := uc.network.channels.Get(bufferName)
+		highlight := false
 		if ch != nil && msg.Command != "TAGMSG" && !self {
 			if ch.Detached {
 				uc.handleDetachedMessage(ctx, ch, msg)
 			}
 
-			highlight := uc.network.isHighlight(msg)
+			highlight = uc.network.isHighlight(msg)
 			if ch.DetachOn == database.FilterMessage || ch.DetachOn == database.FilterDefault || (ch.DetachOn == database.FilterHighlight && highlight) {
 				uc.updateChannelAutoDetach(bufferName)
 			}
-			if highlight {
-				uc.network.broadcastWebPush(ctx, msg)
 		}
-		}
-		if ch == nil && uc.isOurNick(target) {
+
+		if highlight || uc.isOurNick(target) {
 			uc.network.broadcastWebPush(ctx, msg)
+			uc.network.pushTargets.Add(bufferName)
 		}
 
 		uc.produce(bufferName, msg, downstreamID)

user.go

@@ -134,6 +134,7 @@ type network struct {
 	conn        *upstreamConn
 	channels    channelCasemapMap
 	delivered   deliveredStore
+	pushTargets casemapSet
 	lastError   error
 	casemap     casemapping
 }
@@ -154,6 +155,7 @@ func newNetwork(user *user, record *database.Network, channels []database.Channe
 		stopped:     make(chan struct{}),
 		channels:    m,
 		delivered:   newDeliveredStore(),
+		pushTargets: casemapSet{newCasemapMap()},
 		casemap:     casemapRFC1459,
 	}
 }
@@ -377,6 +379,7 @@ func (net *network) updateCasemapping(newCasemap casemapping) {
 	net.casemap = newCasemap
 	net.channels.SetCasemapping(newCasemap)
 	net.delivered.m.SetCasemapping(newCasemap)
+	net.pushTargets.SetCasemapping(newCasemap)
 	if uc := net.conn; uc != nil {
 		uc.channels.SetCasemapping(newCasemap)
 		uc.channels.ForEach(func(uch *upstreamChannel) {